<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
  <script src="../react18/react.development.js"></script>
  <script src="../react18/react-dom.development.js"></script>
  <script src="../react18/babel.min.js"></script>
</head>

<body>
  <button id="btn">修改vDOM,并重新渲染</button>
  <div id="app"></div>
  <script type="text/babel">
    // const vDOM = (
    //   <div>
    //     <h1>diffing算法</h1>
    //     <p>真NP</p>  
    //   </div>
    // )
    // const root = ReactDOM.createRoot(document.getElementById('app'));
    // root.render(vDOM)


    // //给按钮绑定点击事件,修改vDOM 重新渲染
    // //当点击的时候,发现只有p标签重新渲染,其他元素还在浏览中保留
    // const oBtn = document.getElementById('btn');
    // oBtn.onclick  = function(){
    //   const vDOM = (
    //     <div>
    //       <h1>diffing算法</h1>
    //       <p>超级NB</p>  
    //     </div>
    //   )
    //   root.render(vDOM)
    // }
const vDOM=(
<div>
  <h1>diffing算法</h1>
  <p>真NP</p>
</div>

)
const root=ReactDOM.createRoot(document.getElementById("app"))
root.render(vDOM)

const obtn=document.getElementById("btn")
obtn.onclick=function(){
  const vDOM=(
<div>
  <p>超级真NP</p>
  <h1>diffing算法</h1>
 
</div>
  )
  root.render(vDOM)
}



  </script>
</body>

</html>